Electrical and electrochemical characterization of poly (ethylene ozide)/V2O5 zerogel electrochromic films
Vanadium pentoxide xerogel films intercalated by poly (ethylene oxide), PEO, were prepared by direct intercalation method via a sol-gel route. The structural properties were investigated using XRD, HRTEM and FTIR analysis. The detailed studies of electrochromic process and their correlation with flatband potentials have been carried out by cyclic voltammograms and Mott-Schottky plots. The electrical properties along and across V-O layers at the heating and cooling process have been evaluated. These results revealed that the insertion of proper amount of PEO can improve the electrochemical properties of V2O5·nH2O films by increasing the electrical conductivity and decreasing the water vapor absorption. Moreover, Mott-Schottky plots verified the electrochromic process, which can be described using the double insertion and extraction mechanism of lithium ions and electrons. The electrochemical impedance spectra verified that PEO/V2O5 electrochromic films favored the kinetics of V4+/V5+solid-state redox transitions.
Vanadium pentozide Poly (ethylene ozide) Electrochromic films Electrical conductivity Electrochemical impedance spectroscopy
Aiping Jin Wen Chen Quanyao Zhu Ying Yang Victor L.Volkov Galina S.Zakharova
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and Institute of Institute of Solid-State Chemistry, Ural Division, Russian Academy of Science, Pervomaiskaya 91, Yek
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1256-1262
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）